被动式氚取样器性能的实验研究

Experimental study of performance of passive HTO-in-air sampler

介绍了核设施工作场所和环境空气中氚化水蒸气 HTO的监测 ,被动式氚取样器在国外已经得到非常广泛的应用 ,所研制的被动式氚取样器 ,特别适用于 7～ 30 d的长周期取样 ,给出该取样周期内空气中 HTO浓度的平均值。

At present the passive HTO-in-air sampler has been widely used for tritium monitoring at work place and environment of nuclear facilities abroad, This paper describes the work principle of the passive HTO sampler from theory and experimental determination of its diffusion coefficient or effective sampling flow rate is made for φ2～φ10mm of five diffusion orifice in the top of samplers and checked by using paralled comparison sampling of passive sampler and a traditional active sampler for a calibrating cell in which an open evaporating dish filled with tritiated water is placed on the base. This passive HTO sampler with 5g silicon gels in it has been used for preliminary application on site.